Why is Trajan remembered as one of the Five Good Emperors?

Trajan is remembered as one of the Five Good Emperors because his reign, which lasted from 98 to 117 CE, provided the Roman Empire with internal harmony, careful government, and a period of prosperity.12

His reputation for excellence is based on several key factors:

• Governance and Relationship with the Senate: Trajan was known for observing constitutional practices and maintaining a respectful, cordial relationship with the Senate, which helped end the atmosphere of suspicion and intrigue that had characterized the previous reign.2
• Public Welfare: He was deeply committed to the public good, implementing extensive building programs, including roads, bridges, and aqueducts. He also expanded the alimenta, a welfare program that provided support for poor children in Italy.324
• Military Leadership: As a highly capable "soldier-emperor," he expanded the empire to its greatest territorial extent, conquering Dacia and annexing regions such as Arabia and Mesopotamia.352
• The Title "Optimus": His effective and fair administration earned him the official title Optimus ("Best"), reflecting his status as a leader who prioritized the welfare of his subjects and the stability of the state.42